Inspiratory Vital Capacity (IVC)

Definition - What does Inspiratory Vital Capacity (IVC) mean?

Inspiratory vital capacity (IVC) represents the maximal intake of oxygen in proportion to the maximal expiratory level serving as a subset of forced vital capacity (FVC) that measure the size of the lungs. Spirometry is the clinical standard in assessing lung functionality by making comparative analyses between lung size and airflow, reflecting inspiration (breathing in) and expiration (breathing out) variables.

WorkplaceTesting explains Inspiratory Vital Capacity (IVC)

In spirometry, IVC is a telltale marker of gauging the relative elasticity of the lungs to determine if breathing abnormalities exist. Restrictive lung diseases are pathological conditions that can influence FVC calculations from pulmonary lesions constraining the volume of air necessary to fill the lungs. Consequently, IVC anomalies can also impact forced expiratory volume-one second (FEV1) values, a primary metric of spirometry testing that corresponds with inhalation, falling below the normal range.

Regular spirometry testing is a practical method to evaluate the structural integrity of lung tissue, especially if inhaling noxious substances is consistent with the work environment. Because IVC coincides with maximal expiratory levels in testing, a technician weighs a patient’s actual test values against baseline metrics for a physician to review and make a diagnosis according to breathing pattern deviations. Moreover, health and safety guidelines that uphold the use of personal protective equipment (PPE) including the wearing of facial masks serve as a precaution against direct inhalation of airborne pollutants.